Operating Instructions
List of parameters
Parameters
1-295
© Siemens AG 2008 - 2013 All Rights Reserved
SINAMICS G120 CU230P-2 Control Units List Manual (LH9), 01/2013
Description: Parameter for configuring the connection and disconnection of external motors to and from the line voltage.
Connecting external motors to the line voltage enables up to three additional drives to be controlled by the technol-
ogy controller in addition to the main drive. The complete system, therefore, comprises one closed-loop-controlled
main drive and up to three other drives, which can be controlled via contactors or motor starters. The contactors or
motor starters are switched by the converter's digital outputs (see also r2379).
Switching-in motor:
If the main drive is operated at maximum speed and the deviation at the technology controller input increases fur-
ther, the control will in addition connect external motors M1 through M3 to the line voltage. At the same time, the
main drive is ramped down to the closed-loop cascade control switch-in/switch-out speed (p2378) via the down
ramp, so that the total output power can be kept as constant as possible. During this time the technology controller
is switched off.
Switching-off the motor:
If the main drive is operated at minimum speed and the deviation at the technology controller input decreases fur-
ther, the control will disconnect external motors M1 through M3 from the line voltage. At the same time, the main
drive is ramped up to the closed-loop cascade control switch-in/switch-out speed (p2378) via the up ramp, so that
the total output power can be kept as constant as possible.
Value: 0: Closed-loop cascade control inhibited
1: M1 = 1X
2: M1 = 1X, M2 = 1X
3: M1 = 1X, M2 = 2X
4: M1 = 1X, M2 = 1X, M3 = 1X
5: M1 = 1X, M2 = 1X, M3 = 2X
6: M1 = 1X, M2 = 2X, M3 = 2X
7: M1 = 1X, M2 = 1X, M3 = 3X
8: M1 = 1X, M2 = 2X, M3 = 3X
Dependency: Refer to: p2372
Note: Selecting 2X means that a motor is switched in with twice the power (as opposed to 1X, which equates to the motor
power at the converter).
Description: Parameter for selecting the control mode for switching-in and switching-out external motors.
Selection 2 and 3 support selection options for automatically interchanging the motors, which are connected to the
line supply.
Value: 0: Fixed sequence
1: Closed-loop cascade control after absolute operating hours
2: Automatic replacement after continuous operating hours
3: Automatic replacement after absolute operating hours
Note: Re p2372 = 0:
Motor selection for switching-in/switching-out follows a fixed sequence and is dependent on the closed-loop cas-
cade control configuration (p2371).
Re p2372 = 1:
Motor selection for switching-in/switching-out is derived from the operating hours counter p2380. When switching-
in, the motor with the least operating hours is connected. When switching-out, the motor with the most operating
hours is disconnected.
p2371 Closed-loop cascade control configuration / Csc_ctrl config
Access level: 3 Calculated: - Data type: Integer16
Can be changed: T Scaling: - Dyn. index: -
Units group: - Unit selection: - Func. diagram: -
Min Max Factory setting
0 8 0
p2372 Closed-loop cascade control mode motor selection / Csc_ctrl mode
Access level: 3 Calculated: - Data type: Integer16
Can be changed: T Scaling: - Dyn. index: -
Units group: - Unit selection: - Func. diagram: -
Min Max Factory setting
0 3 0